Inventor · disambiguated record
Takumi Hayakawa
Also filed as: HAYAKAWA TAKUMI
3 granted patents·36 citations·filing 1974–1987
70Inventor score
Technology areasH01M
Top patents by PatentIndex Score
3 records- 0147US4652505ASealed lead storage batterySHIN KOBE ELECTRIC MACHINERY·Filed 1985·Granted Mar 24, 1987·17 cites·2 claims
- 0242US4758482AEnclosed type lead batteries and method for producing the sameSHIN KOBE ELECTRIC MACHINERY·Filed 1987·Granted Jul 19, 1988·13 cites·13 claims
- 0335US3944431APlate grid in use for a plate for a lead storage batteryKEISHIN MATSUMOTO·Filed 1974·Granted Mar 16, 1976·6 cites·7 claims
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